This is truly unfortunate but happens frequently as people are unprepared and/or
unaware of the deadly consequences of being submerged in cold water. Just
because you are on a boat doesn't mean it can't happen to you. The moral is
be informed and be prepared if you MUST go out on cold water. A search of
recent surface water temperature in the area of the incident revealed it was 50*F,
probably a little lower in my opinion.
Below are some points about same from a paper I wrote some years back about
cold water shock and hypothermia.
* In northern latitudes during March, April and May the highest percentage of
deaths occur from people going out on dangerously cold water. (2)
* Alaska has 10 X the national boating fatality rate. (9)
* An average person has a 50/50 chance of surviving a 50 yard swim in 50* F water.(13)
* A 50 year old person in 50* F water has a 50/50 chance of surviving 50 minutes. (13)
[In this incident, 5 people were in about 50* F water for 1.5 hours]
* When the water temperature is < 60* F, wear “specialized insulating clothing”
(wet/dry suits, Polartec 2000, etc)
A life jacket, alone without specialized protective clothing, in cold water is no
assurance you will survive cold water shock or hypothermia. * Strong
swimmers wearing a PFD have died before covering 100 yards in cold water. (14)
Refs:
(2) “Baby It’s Cold Outside (believe it or not)”, Pennsylvania Fish & Boat
Commission, Apr 21, 2005,
www.sites.state.pa.us
(9) “Cold Injuries Guidelines”, Version 2003, State of Alaska,
www.chems.alaska.gov
(13) “Safety On (and in) the Water”,
www.capital.net/com/nckayak/nck_safety_p4.html
(14) “Hypothermia and Cold Shock”, P Siedel, USCG Aux,
www.auxguidanceskills.info/press/hypothermia.html
Aye.
PS: Unfortunately, the most stable position for a catamaran in the water is
upside down.